Impact 20

From Author Wars - https://authorwars.com/publications/impact-20-330184.html

Overview:

Title: Impact 20
Author: William F. Nolan
Year: 2002
ISBN-10: 1887368655
Publisher: Gauntlet Press
Pages: 240
Binding: Hardcover
Type: Collection
Title Reference: One of Those Days
Notes:
- Limited edition hardcover that incorporates and expands Nolan's 1963 paperback original collection Impact-20. It adds four new essays, plus three additional stories that "were all written in the 1950s and have never been previously printed" (per Nolan's 2nd "Author Commentaries".)
- On Limitation page at front of book:
  - "Numbered Edition", "Limited to 350 Copies"
  - "This is number [hand-written number]"
  - Signatures of William F. Nolan and Gary A. Braunbeck
  - "A Classic-Revisited"
- On copyright page: "Limited Edition (revised and expanded): Copyright (c) 2002", "Cover Art Copyright (c) 2002 William F. Nolan"
- No price on dust jacket.